Free · Grade 6 · 2 or 3 numbers
Greatest common factor worksheets
Working on greatest common factor? Print this sheet as it is, or change the level and questions first.
- Answer key included
- Reopen this exact sheet
- Letter & A4 ready
The answer key prints on a separate page.
What's on this sheet
Every set is built to share a real factor greater than one, and no number divides another, so the answer is never trivially the smallest number and never just one. That construction keeps the practice honest: a child has to actually compare factors rather than read the answer off the page. Choose two numbers or three, and set the size with the level control.
Why this sheet works
The sheet follows the clean worksheet convention — the instruction is stated once at the top, and each line simply lists the numbers with an arrow to the answer (42, 54 → GCF = __) instead of repeating the full sentence every row. That keeps a page of practice quick to scan. The answer key prints the GCF for every set.